There doesn't appear to be a simple component available to create a folder selection dialog in Delphi 2009, although a file selection dialog is provided by way of the TOpenDialog.
What is the most common way to create a modern folder selection dialog using Delphi?
There are two overloaded routines in FileCtrl.pas called SelectDirectory
For a modern look, use the second form, with sdNewUI
NOTE: sdNewFolder, sdNewUI etc are only available from D2006+